- 51 -
INST
ALLA
TION
INSTALLATION
The thermostat must be insulation class II (
) or must be correctly connected to earth.
Connecting the zone valves controlled
by the ambient thermostat
Fig. 6.22
L
N
V
T
Zone valve
with micro contact
Ambient
Thermostat
Potential free contacts of the zone valve micro switch
Use the ambient thermostat's clamps indi-
cated in Fig. 6.16 and Fig. 6.17 . to connect
the zone valve Insert the electric cables of
the zone valve's micro switch contacts in
clamps “1 and 3” of the ambient thermo-
stat's terminal block as in Fig. 6.17 .
Remove the electric jumper between “1
and 3”.
Be careful not to connect pow-
ered cables on clamps “1 and
3”.
The route of the boiler and ambient thermo-
stat's electric power supply cable or wires
must follow the route indicated in Fig. 6.17 .
Allow the cables to exit the boiler by using
the relevant cable clamps Y ( Fig. 6.18 ).
External frost protection
6.11
Connect the frost thermostat between ter-
•
minals 1 and 2 as shown in Fig. 6.23 or
Fig. 6.24 .
Do not connect live wires to terminals to
which the frost thermostat must be con-
nected.
Fig. 6.23
Room thermostat
N
L
3
2
1
(230V rating)
Frost Thermostat
(230V rating)
T
T
Fig. 6.24
1
2
3
L
N
Frost thermostat
(230V rating)
Room
thermostat
with anticipating
resistor
(230V rating)
T
T
